Gerald “Jerry” Heller, the N.W.A. music manager played so memorably — and, to Heller himself, hurtfully – by Paul Giamatti in Straight Outta Compton, has died in California at 75. Unconfirmed reports say Heller suffered a medical emergency while driving and crashing his minivan. The death was confirmed to Billboard by Heller’s cousin. Heller, whose music biz career stretched back to involvement with such superstars of the 1960s and 70s as Marvin Gaye and the Who, was so…